Arrows and darts



April 1, 1953 E. SCHWITZKI. 2,828,965

mows AND: DARTS Filed June 1, 1955 IN VEN TOR. E1. w/m 5211M rzk/ ARROWSAND DARTS Elvino Schwitzki, Buenos Aires, Argentina Application June 1,1955, Serial No. 512,543

2 Claims. (Cl. 273-1065) This invention relates to improvements inarrows and darts, and more particularly to certain improvements fordirecting said arrows in flight after having been released from the bow.

Known arrows are fletched either with feathers or with longitudinalblades made from wood or plastics. In both these cases it is difficultto properly fletch an arrow, as an accurate fletching is ratherdifficult to obtain.

One important object of this invention is to provide means substitutingthe usual fletching by means contributing to a more economical arrowstructure and to secure at least such great accuracy as the conventionalfletching does.

Another object of the invention is to provide means imparting to thearrow device directional guidance for use in target, hunting and fieldarrows.

A further object of the invention is to provide means conducive to agood gripping location to take the arrow when placed in the bow andinserted in the string.

Another object of the invention is to provide means affording an arrowstructure having no protruding directional means.

The invention essentially consists in providing arrows, in the placewhere conventional feathers or the like are fietched, with at leastthree longitudinally depressed areas or curved flutes or recesses ofelongated elliptical form and symmetrically arranged around the axis soas to give it a polygonal section in the place corresponding to themiddle of the recesses.

In order to provide a better understanding of the invention, a preferredform of embodiment will be described hereinafter with reference to theaccompanying drawings, in which:

Fig. 1 is a lateral view of both the ends of an arrow, showing therecesses made in the place of the ordinary fletching.

Fig. 2 is a cross-section of the arrow shown in Fig. 1, taken along lineA-A.

As it will be seen, the arrow-shaft 1, which comprises the conventionalpointed end 2, conventional end 3, and nock or notch opening 4, presentsat the place where the usual fletching is made, three elongateddepressed areas or recesses 5, formed each, for instance, by removingmaterial from said shaft 1 along a shallow curved plane. These threerecesses are disposed symmetrically with respect to the axis of shaft 1so as to provide it with a triangular section at the central part of theshaft taken through the recesses, as shown in Fig. 2.

It has been found that the said recesses advantageously contribute to afunction approximating ordinary feather fletching or wings. When thearrow is in flight, apparently air presses against the fiat or shallowcurved bottom of the recesses so that the arrow moves in the desireddirection.

The recesses may be made more economically and easily than the usualfletching, and present the advantage that they are not subject todeformation or damage as the ordinary fletchings are. Furthermore, asthere are no pronited States Patent truding parts on the arrow, whensame travels while still in contact with the how, the arrow according tothe invention is not subject to deviations which ordinarily are provokedby feathers or wings.

The recesses may be in number greater than three but they must bysymmetrically arranged in the rearward part of the arrow. The recessesmaybe made by cutting them off from the Wooden shafts of arrows or byrecesses into the arrows if made from plastics.

It will be seen from the aforesaid disclosure that the arrow structurehas a shaft of substantially equal diameter throughout and provided witha pointed piece at one end and with a nock at the other end, and atleast three elongated recesses symmetrically grouped about the axis ofsaid shaft, and located adjacent said nock end, each of said recessesbeing relatively shallow and defined by end edges converging to thesurface of said shaft, the extremities of said end edges of each recessbeing positioned on said shaft surface, said extremities of saidrespective end edges lying along a line parallel to the shaft axis, thecross section at the center part of said recesses forming asubstantially equi-lateral triangle.

Having thus fully described my invention, what I claim as new is:

1. An arrow structure for use in archery; comprising an elongated shaftof substantially equal diameter throughout its length and provided witha pointed end piece at one end and with a nock at the opposite end andintegral with said shaft, at least three elongated depressed areaslocated in the shaft and symmetrically grouped about the axis of saidshaft, said depressed areas being defined by longitudinal edges andextending in longitudinal direction of said shaft starting at a locationspaced a predetermined distance from said nock and reaching for arelatively short .distance in the direction of said pointed end piece,the

Width of each depressed area being greatest at approximately the centerpart thereof and terminating short of the outer surface of said shaft tothereby leave unaffected respective shaft portions disposed between saidlongitudinal edges of adjacent depressed areas, each of said depressedareas being bounded at each end by said longitudinal edges whichconverge toward the surface of said shaft with the intersection of saidedges lying in a plane which passes through the axis of said shaft, thecross-section of said shaft at said center parts of said depressed areasforming a substantially equilateral triangle.

2. A structure for an arrow, dart and like elongated element; comprisingan elongated shaft of substantially equal diameter throughout its lengthand provided with a pointed end piece at one end thereof and with a neckat the opposite end, elongated symmetrically grouped, longitudinallyextending depressed areas provided adjacent the neck and integral withsaid shaft, said depressed areas being disposed about the axis of saidshaft and spaced a predetermined distance from said neck and extending arelatively short distance in the direction of said pointed end piece,the width of each depressed area being defined by longitudinallyextending marginal edges and being greatest at approximately the centerpart of said depressed area, said width extending in transversedirection with respect to the shaft axis and terminating at apredetermined distance from the outer surface of said shaft to therebyleave unaffected respective shaft portions which are confined betweensaid marginal edges of adjacent depressed areas, said marginal edges ofsaid depressed areas converging at each end thereof toward said outersurface of said shaft, said unaffected shaft portions adjacent saidcenter part of said depressed areas being of smaller width than saidunaffected shaft portions adjacent said converging marginal edges.

(References on following page) 3 4 References Cited in the file of thispatent 2,540,079 Ferguson Feb. 6, 1951 UNITED STATES PATENTS 2,531,884Rmg l 1952 1,162,200 Winans NW 30) 1915 2,599,626 G s h lk n 0, 19521,328,967 Reaben -2 Jan. 27, 1920 1,907,273 Umling May 2, 1933 OTHERREFERENCES 2,209,672 Boggs July30, 1940 Archery, The Technical Side,North American Press,

2,484,589 Richards Oct. 11, 1949 1947, pp. 82, 83.

